-al a-a a-b a-c aaa aab aac aae aag aal aas ab- aba abb abc abe abg abl abs ac- aca acb acc ace acg acl acs aea aeb aec aee aeg ael aes ag- aga agb agc age agg agl ags al- ala alb alc ale alg all als as- asa asb asc ase asg asl ass baa bab bac bae bag bal bas bba bbb bbc bbe bbg bbl bbs bca bcb bcc bce bcg bcl bcs be- bea beb bec bee beg bel bes bga bgb bgc bge bgg bgl bgs bla blb blc ble blg bll bls bsa bsb bsc bse bsg bsl bss c-- caa cab cac cae cag cal cas cba cbb cbc cbe cbg cbl cbs cca ccb ccc cce ccg ccl ccs ce- cea ceb cec cee ceg cel ces cga cgb cgc cge cgg cgl cgs cl- cla clb clc cle clg cll cls csa csb csc cse csg csl css eaa eab eac eae eag eal eas eba ebb ebc ebe ebg ebl ebs ec- eca ecb ecc ece ecg ecl ecs eea eeb eec eee eeg eel ees ega egb egc ege egg egl egs ela elb elc ele elg ell els es- esa esb esc ese esg esl ess gaa gab gac gae gag gal gas gba gbc gbe gbg gbl gbs gca gcb gcc gce gcg gcl gcs ge- gea geb gec gee geg gel ges gga ggb ggc ggg ggs gla glb glc gle glg gll gls gsa gsb gsc gse gsg gsl gss la- laa lab lac lae lag lal las lba lbb lbc lbe lbg lbl lbs lca lcb lcc lce lcg lcl lcs lea leb lec lee leg lel les lga lgb lgc lge lgg lgl lgs lla llb llc lle llg lll lls lsa lsb lsc lse lsg lsl lss saa sab sac sae sag sal sas sba sbb sbc sbe sbg sbl sbs sca scb scc sce scg scl scs se- sea seb sec see seg sel ses sga sgb sgc sge sgg sgl sgs sla slb slc sle slg sll sls ss- ssa ssb ssc sse ssg ssl sss